北非OUED MYA盆地B区块油藏特征及油气富集因素分析
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摘要
北非OUED MYA盆地,是一个富含油气的中生代—古生代叠合盆地,B区块位于OUED MYA盆地中北部,是下古生界、上古生界和中生界3套含油层系叠合发育的地区。研究表明,B区块具备多套生储盖组合,油气储量大、产量高;沉积特征为干旱或半干旱气候环境下的海陆交互相特征,储层岩性主要为碎屑砂岩,储集空间以原生孔隙为主,次生溶孔和微裂隙也对储层产生重要影响,优质储层受控于岩石结构(粒度)以及次生孔隙的发育程度。通过对油气富集高产因素分析后认为:良好的油源、河道心滩、边滩或障壁砂坝储层及下生上储近距离的油气运移和保存条件是B区块获得高产的主要因素。
Block B was located in north-central OUED MYA Basin which was a Mesozoic-Paleozoic superposition basin with rich oil and gas.Block B was the composite development region with three oil-bearing strata,namely Lower Paleozoic,Upper Paleozoic,and Mesozoic.Block B had several source-reservoir-cap rock associations with abundant oil and gas reservoirs.The sedimentary environment was characterized by the continental-oceanic interactive facies in the arid or semiarid climates.The reservoir was dominantly clastic sandstone.Primary pores were the basic reservoir space,while secondary pores and micro-fracture also had an important influence,and the quality of reservoirs was controlled by the texture of rock and the degree of development of secondary pores.The analysis results showed that Block B may be interpreted as favourable place for oil and gas accumulation due to good oil resource,channel bar,bar point or barrier bar on the reservoir,and short distance migration of oil and gas.
Block B was located in north-central OUED MYA Basin which was a Mesozoic-Paleozoic superposition basin with rich oil and gas.Block B was the composite development region with three oil-bearing strata,namely Lower Paleozoic,Upper Paleozoic,and Mesozoic.Block B had several source-reservoir-cap rock associations with abundant oil and gas reservoirs.The sedimentary environment was characterized by the continental-oceanic interactive facies in the arid or semiarid climates.The reservoir was dominantly clastic sandstone.Primary pores were the basic reservoir space,while secondary pores and micro-fracture also had an important influence,and the quality of reservoirs was controlled by the texture of rock and the degree of development of secondary pores.The analysis results showed that Block B may be interpreted as favourable place for oil and gas accumulation due to good oil resource,channel bar,bar point or barrier bar on the reservoir,and short distance migration of oil and gas.
引文
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[2]翁望飞,季红军,张涛,等.阿尔及利亚A区块三叠系油气成藏条件与富集控制因素[J].岩性油气藏,2010,22(1):76-81.
[3]李士春,冯朝荣,殷世江.鄂尔多斯盆地南部中生界延长组沉积体系与油气富集[J].岩性油气藏,2010,22(2):79-83.
[4]谢结来,曹强,于京波.阿尔及利亚大深度低幅度构造地震解释技术应用及效果[J].石油地球物理勘探,2008,43(增刊1):108-114.
[5]陈霞,于慧玲,何雨丹,等.阿尔及利亚三叠盆地GUERARA地区石油地质条件分析[J].石油实验地质,2008,30(3):256-259.
[6]郭飞飞,康建云,孙建峰,等.江汉盆地构造演化与海相地层油气成藏模式[J].岩性油气藏,2010,22(1):23-29.
[7]冯一波,丁晓琪,谢世文,等.麻黄山地区中生界油气分布规律及控制因素分析[J].岩性油气藏,2009,21(3):60-64.
[8]孔祥宇,殷进垠,张发强.哈萨克斯坦南图尔盖盆地油气地质特征及勘探潜力分析[J].岩性油气藏,2007,19(3):48-53.
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